Method and means for forming coil retainers



1,743,553 l 0 L; E' KOOS Jan. 14

AINERS .G COIL RET l FOR FORMIN Sheet AND MEANS 3 Sheets METHOD l Filed April 18, 1919 origina llMUlll \EHUIHWWIIINllllIlllllllllIHIIIIIIHIUIHHIIHIIIIIIIIHI Y A INVENTOR.

' 5 dw/'ence f. /1/00 ATToRNEY Jan. 14, 1930. L.. E. Koos 1,743,553

METHOD AND MEANS FOR FORMING: COIL RETAINERS .original Filed April ls. 1919 s sheets-sheet 2 IN VEN TOR.

Lawrencef /fvolf ATTORNEY Jan. 14, 1930. L. E. Koos 1,743,553

METHOD AND MEANS FOR FORMING COIL RETAINERS original Filed April 18. 1919 s sieeis-sheei 3 INVENTOR. f1 m Law/ence E /fooa @mam ATTORNEY Patented Jan. 14, 193()A Unirse srnirns PATENT oi-"Fien LAWRENCE E. KOOS, OF TOLEDO, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE ELECTRIC AUTO-LITE COMIEANY, OE TOLEDO, OHIO, A CORPORATION OF OHIO METHOD AND MEANS FOR FORMIITG COIL RETAINER-S Application led April 1S, 1919, Serial N'o. 290,985. Renewed May 21, 1928.

This invention relates to a method and means for constructing dynamo-electric machines, having cores with coils wound in slots. More particularly the invention relates to a 5 method and means for bending or folding the two free ends of the strip of insulation material commonly employed as a slot lining sor that they constitute in effect a coil retaining means.

In the construction ofthe dynamo-electric machines having slotted cores containing windings, the winding is usually covered with one or more layers of insulation material and in the case where wire formingl the winding is wound in the slot by hand or machine the insulation has commonly' taken the form of a thin eXible strip of iibre which was pressed intopthe slot previous to the Winding operation.

After the winding was completed a retainer in the form of a strip, wedge or stick was forced into the slot at its mouth, being itself retained in position by engaging grooves formed in the walls of the slot or by the overhanging extremities of the teeth. Any excess of insulation was then trimmed oli.

An object of this invention is tol fold or bend the insulating strip constituting the slot lining in place over the mouth of the slot.

A further object is to eliminate the retaining wedge or stick or other separate retainthe objects' of my invention lin one instance' by the devices and means described in the following speciiicatiom'but it is evident that the same may be put to various uses andvaried widely without departing from the scope of the invention as pointed out in the appended Y claims, A s'tructure constituting oneembodichine in this instance with a wound arma-V ture mounted thereon and in position to be operated upon.

Figure II is a perspective view of a wound armature with the tool for bending the slot lining shown isolated from its holder and in position to enter a slot.

AFigure III is a perspective view of a shoe forming a part ofthe bending tool.

Figures IV, V and VI are respectively, a bottom plan view, an end view and a side view of the bending tool. V

Figure VII is a sectional view taken on the line VII-VII of Figure IV.

Figures VIII, IX and X are sectional views taken respectively on lines VIII-` VIII, IX-IX and X-X of Figure VII.

Figure XI is a side view of the tool corresponding with Figure VI but showing the` iirstshoe in the process of folding over one free end of the slot lining.

Figure XII is a view similar to Figure XI ybut shows the tool fur-ther advanced so that the second shoe is in the process of folding free end of the slot lining. y

Figures XIII and XIV are'views similar respectivelyto Figures XI andv XII but show the opposite side of the tool, portions of the cross sectional views are taken looking in the direction of the small arrows. Y

' In Figure I of the drawings there is shown kin plan the complete machine whichrecontact element is carried by thercarriage 4t,`

constituting in the embodiment disclosed moving means to yoperate on the armature itself. Y a Y An enlarged view of theV armature 1s shown in Figure II where the slots in the upper half Y the slot over the first free end and as the shoe have the insulating slot li1iing.projecting abovevv the periphery and thek tool 6 is shown in position about to enter a slot.

The tool 6 comprises a block 7 having a projecting flange portion 8 .whose inner part has a curvedtapered opening 9.V Secured tothe block'7 is a shoe 10 Vconstituting a. pilot member which as shown inFigures VI and VII has an angular portionll projecting downwardly and rearwardly and is separated from the block 7 by a space 12. The lower portion of the extremity of this shoe is provided with two flanges 13 which are clearly Vshown in Figures III and V.

-' The tool 6 further comprises a second Vblock 14 and-shoe 15.V The block 14 is similar to the previously' described block 7 ex- Y cept that the flange 17 corresponding lto the flange 8 of block 7 is located onthe opposite i armature having stripsof sheet fibre or other l Y ychine each'in'sulation strip 20 has its two free I V"ends projecting fromjthe mouth of a slot and side.v This `block 14 like block 7 has a curved tapered opening 18 correspondingk yto the opening 9. The shoe 15 is s ubstantiallylike shoe 11, previously described, and is separated from the block 14 by 'a space 19. The two blocks andY two shoes 'are all secured to-y gether by a bolt 16 as shown. .Y

In the operationofthedevice a wound insulating material between the winding and the walls of theslots Awith thevfree end portions of the insulation extendingoutwardly beyond the periphery is mounted between centers as shown in Figure I and the Atool V6 Vearried'by the carriage 4 is caused to advance along each slot in succession, the

each forward movement tion which may-be Ydone. by hand or by maare -somewhat flared.` As the tool 6 is caused l gages the curved portion -9 of the block 7 by f which it is bent inwardly into the opening Y to advance, the lower Vportion'of ther'first shoe 11 enters'aL slotand rides over the windingl compressing it s li'ght1y,"and atl the same timey one'free end 21 ofthe insulating strip en- 12. Thisrstage of Vthev operation is illuswithdrawn lea-ving the portion 21V within the slot and directly over the winding. v Further movement of the 'tool brings the shoe 15 intoV position over thefportion 21 and as this shoe advances this portionv isforced'fdow'n against Y the winding as` clearly shown by Figure IX.V

. In amachine 'trated by Figure VIII. I Upon further more ment of the toolgthe'end Vportion 21 is forcedV i' 'downward bythe lower inclined surface of Y Y the block 7, theV shoe 11 beingat the same timey is Vwithdrawn' the two ends of the insulating Y strip take the form shown in Figure X being retained in position by the overhanging projections .of Vthe teeth.

In theactual construction of the machine `the length of the tool is so proportioned relative to the length of the armature core, the number and angularityV of theslots and the pitch that one forward traverse of'theftool is just sufficient to rotate the armature a dis@y tance equal to the pitch so thatthe next slot is brought into proper alinement for the next forward traverse of the tool, Y The 'machineis constructed to operate automatically"r so that lafter being started the'tool willvbe advanced along Va slot turning inthe free'ends of the insulation, at the kendpof the forwardV move-` Y ment it will be withdrawn to clear the .arma-V ture, be returned tothe-initial position andV again started forward along the nexteslot, These operations are repeated until all the slots are completed when the machine.V will automatically be stopped.' .f

It ywill thus be seen'that the winding may be effectively retained within the slots without the customary kseparate retaining strip or wedge or lif desireda separate retainer may be employed either within Vor without loo the bent over ends of the insulation lining...

` By reason `of the fact that this operation of folding over, the free ends of the insulation .lining may beaccomplished byan automatic j machine; thisfeature `of the production is i cost thereof Vregreatly facilitated andi the duced to a minimum.

. WhilefI have described my invention in i, moreor less detail and as being embodied inV Y certain precise-forms I donotldes'ire or in- `tend to Vbe limitedtheretoaslon the contrary my invention contemplatedV broadly all proper adaptations in usechange's thereof, as well Vas the omission of, immaterial elements and' 'i the` substitution of equivalents therefor Vas circumstances may suggest or necessity render expedient. i

' 'Having' thus described my invention, what i I claim as new and desire to secure by Letters Patent, is: Y Y y f Y Y 4 forfconstructing a dynamo# electric machine Vhaving a. core with a Vslot containinga. coill and a Vflexible lininglmember separating the coil from the walls of theV slot, a deviceadaptedfto be movedlongitudi- Y Y iso Y ll() f the slot.

8. ln a machine for construe lng a dynamoelectric machine having a core wion a slot therein containing a winding and a flexible lining between the wind'ng and the core,-a device adapted to be moved alon Y the slot having means for crowding down the winding and for bending inwardly one free edOe' of the said ieaible lining into the mouth of the slot to thereby retain the winding said means including a support; a c'am secured to the support with camming surfaces at the forward side thereof in the line of perative movement of the device, said camming surfaces being divergent in said forward direc Y bending the other free edge of the said flexible member against the opposite slot wall..

5. il. device of the class described con'iprising' means for rotatively mounting a. wound core structure having diagonally arranged slots, a tool, means for supporting said tool and for moving the same along the said core structure in an axial direction and subsequently returning it to its initial position, the tool being constructed to operate upon the core snucture and in its forward movement to follow the said slots thereby rotating the core structure an amount equal to the pitch of the slots.

6. ln a device for assembling armatures having bottle shaped slots with a large winding retaining portion and a restricted'neck portion, lined with insulating material; the combination with a pilot having flange and web portions adapted to enter the retaining portions and the neclr portions respectively; of a folding means for turning down the edges of the lining material against the windings in the slots, said means including flange and web portions corresponding to, and in alinement with, but spaced apart from the flange and web portions of the pilot, and provided with a camming surface for engaging and turning down the lining material under the flange of the folding means,

Ain o' 7. In a device for assembling armatures having bottle shaped slots with a large winding retaining portion and a restricted neck portion, lined with insulating material; the combination with a pilot having flange and web portions adapted to enter the retaining portions and the neck portions respectively; of a folding means for turning down the edges of the lining material against the windings inthe slots, said means includinga flange portion corresponding to and in allnement with but spaced apart from the flange portion of the pilot, and of shorter length than the length ofthe armature slots, anda web portion greater in transverse dimension than the web portion of the pilot and in direct alinement with but spaced apart from said pilot web, and an inclined camming surface at the extremity of both the flange and web portions of the folding means, and adjacent to the rear end of the pilot flange and web, for turning the ends of the lining material beneath the flange of the folding means.

8. ln a mechanism for constructing dynamo-electric armatures having a core with a slot therein containing windings and a flexible lining between the winding andthe core, a device adapted to be moved along a slot of said armature having means for crowding down the winding and for bending inwardly one free edge of the lining into the mouth of the slot thereby to retain the windings, said deviceincluding a support and a cam secured to and movable with the support, said cam having camming surfaces adjacent the foi'- w rd edge of the device in the direction of operative movement thereof, said surfaces being divergent outwardly in the line 0f iovement and downwardly curved.

9. ln a mechanism for constructing dynamo-electriearmatures having a core with a slot. *l -..g ible lining between the winding and the core, a device adapt-ed to be moved along a slot of said armature having means for crowdport, said cam having camming surfacesadlmeent the forward edge of the device in the direction of operative movement thereof, said surfaces being divergent outwardly in the line of movement and downwardly curved; and a shoe depending from said support to vthe rear of said cam in the direction of movement of the device. l0. The method of constructing a dynamoelectric machine, having a core with a slot having a contracted mouth containing a coil and a flexible lining separating the coil from the walls of the slot, which consists in foldthe free ends of the lining over each other-,across the. mouth of the slot, and secur- Ving one end by frictional contact v wall of the slot. Y Y 1,1. The method of constructinga'dynamowith one electric machine having a core with aslot having contracted mouth and containingv a coil anda flexible membervfor separating vthe coil from the WallsV of the slot which opposite wall.

comprises bending a'free end of the flexible member which is ladjacent one slot Wall over the Amouth of the slot against the opposite wall, said end being secured across the mouth of said'slot by' frictional engagement with said opposite wall. 1

12. 4The method of constructing a dynamovelectric machinefhaving a core with a yslotV 'containing av coil and a liningrbetween the coil and walls ofthe slot,rwhich comprises rolling one corner of a free end of the lining normally adjacent one wall of therslot toward the Vopposite wall, and progressively rolling the reniainderofv said end toward the 13. Iii a mechanism used in constructing a dynamo-electric machine, the combination of a support, means for movably mounting a core structure upon said support, and a'movable member; the member being Aadapted Vto engage the core structure whereby Vthe same 1s moved a predeterminedk amount v.with each successive movement of saidmember.

14. In a mechanism'used in constructing a 'dynamoelcctricmachine, the combination of a support, means for'movably mounting a core Lst-ructure upon said support, a member and 'means for holding saidmember; said memberV being adapted to be moved with respect l tosaid core structure whereby said member engages the core structure Vand moves Vthe same a predetermined amount with eachsuc-vv e Vcessive operation of saidmember. y

, 15. In a mechanismusedin constructing-al dynamo-electric machineV in combination,VV

' means for rotatively mounting a core structure, said core structure having a plurality of spaced recesses formingteeth thereon; means forindexing lthe core struc-ture acting on said teeth, comprising a movable contactfelement andA means for supporting said element; the parts being so. arranged that each rmovement of the Contact element operates to rotate the core structure a predetermined amount.V

VV16. In a mechanism used in constructing a dynamo-electric machine, in combination, Vmeans for i'otatively mounting a core structuie provided with a Yplurality of recesses;

means for performing an operation in saidv recesses; and meansto Aindex the coreacting upon said recesses comprising a movable meinber; the member adapted to engage the ,core

.recesses whereby movement of said member,V Y Y rotates the core structure a predetermined f amount.

17. In a mechanism used in constructing aY dynamo-electric machine, in combinatlon, Y *means for rotatively supporting a core struc-'v ture, said core structure having spaced 'recesses; means for indexing the core structure acting in the recessescomprising a movable' member; means for supporting said member;

dynamo-electric machine, in combination,V

Vmeans for rotatively mounting a-core struc-y ture said core structure having a plurality of 4spaced recesses forming teeth thereon; means for indexing saidcore structure acting'in said teeth, comprising a movable contact element; meansforsupporting said element and manually Yoperated means for moving the same with respect to said core, the element being,

adapted to operate upon said teeth thereby rotating said core structure a predetermined amount. Y f ,e 19. The method'of constructing adynamoelectric machine having a core with a slot having a contracted mouth containing -a winding and alining between the Winding and the walls of the slot which consist in forcing a free end'of said lining adjacent one wall of the slot over said winding and underthe projectf-V.

ing portion of the opposite Wall. Y f

20.V Ina mechanism used in constructingaV dynamo-electric machine in combination, means for movably supporting'a core structure having spaced recesses forming teeth thereon and means Vfor indexing the core structure acting on said teeth comprisingfa movable member, a contact element carried by said member and guiding means causing said contact elementto engage the teethofv said vcore structure movingA the ,same an' amount equal to the space between the core re-V cesses. Y v Y v Y In testimony whereof, I alix my signature.

LAWRENCE Koos. 

